Normally, the app icon will show up on the page you happen to be on when you install the app. So, if you're on page 3, it'll go there. I don't believe there's a way to change it. Just make sure you're on your homepage before you install the app.
I am running Lollipop on an Insignia tablet, and there is only one page, my homepage. The page is not full; it has room for many more icons. When I download an app, though, an entirely new page is created with only one icon, the new app. Could this be Insignia-specific?
Sorry, I have no clue as I don't own your tablet. I thought the icon was just placing itself on the page you were on. I didn't know it was creating a new page. Strange behavior.
The only thing I can think of is delete the page after you move the icon. I know you already figured that out.